package main

// import "fmt"
import . "nc_tools"

/*
 * type ListNode struct{
 *   Val int
 *   Next *ListNode
 * }
 */

/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 *
 *
 * @param pHead ListNode类
 * @param k int整型
 * @return ListNode类
 */
func FindKthToTail(pHead *ListNode, k int) *ListNode {
	// write code here
	slow := pHead
	fast := pHead
	for i := 0; i < k; i++ {
		if fast == nil {
			return nil
		}
		fast = fast.Next
	}
	for fast != nil {
		fast = fast.Next
		slow = slow.Next
	}
	return slow
}
